Drought stress has contrasting effects on antioxidant enzymes activity and phenylpropanoid biosynthesis in Fraxinus ornus leaves: An excess light stress affair?

Fini, Alessio; Guidi, Lucia; Ferrini, F.; Brunetti, Cecilia; Ferdinando, Martina Di; Biricolti, Stefano; Pollastri, Susanna; Calamai, Luca; Tattini, Massimiliano

doi:10.1016/j.jplph.2012.02.014

Cited by 143 publications

(109 citation statements)

References 92 publications

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“…Stress treatments caused a significant increase in MDA and H 2 O 2 content, suggesting that water-stressed plants have confronted lipid peroxidation and cellular damage, which were higher in coastal ecotypes (Table 3). An increase in H 2 O 2 accumulation and lipid peroxidation during drought stress was shown in our previous study on A. spinosa (Chakhchar et al 2011) and has also been reported by Al-Ghamdi (2009) and by Hameed et al (2013) in Triticum aestivum, by Boughalleb and Mhamdi (2011) in Olea europaea and by Fini et al (2012) in Fraxinus ornus leaves. Its accumulation seemed to depend on the intensity of stress water treatments (Fini et al 2012).…”

Section: Discussionsupporting

confidence: 85%

“…An increase in H 2 O 2 accumulation and lipid peroxidation during drought stress was shown in our previous study on A. spinosa (Chakhchar et al 2011) and has also been reported by Al-Ghamdi (2009) and by Hameed et al (2013) in Triticum aestivum, by Boughalleb and Mhamdi (2011) in Olea europaea and by Fini et al (2012) in Fraxinus ornus leaves. Its accumulation seemed to depend on the intensity of stress water treatments (Fini et al 2012). The increase in MDA content clearly reflects membrane damage due to the lipid peroxidation of polyunsaturated fatty acids in the presence of ROS (Montillet et al 2005;.…”

Section: Discussionsupporting

confidence: 85%

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Physiological and biochemical traits of drought tolerance inArgania spinosa

Chakhchar

Wahbi

Lamaoui

et al. 2015

Journal of Plant Interactions

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The objective of this study was to understand and characterize the physiological and biochemical tolerance mechanisms of Argania spinosa under drought stress for selection tolerant ecotypes. Significant differences were observed among ecotypes in indices of leaf water status studied: stomatal conductance (g s ), predawn leaf water potential (Ψ pd ) and leaf relative water content. There was a significant decrease in these physiological traits with increasing degree of drought stress in all ecotypes. Drought stress significantly increased endogenous H 2 O 2 and lipid peroxidation. Moderate and severe drought stress increased significantly the catalase, superoxide dismutase, peroxidase, polyphenoloxidase and lipoxygenase activities, depending on time. Their constitutive activities were higher in inland ecotypes than in coastal ecotypes. According to canonical discriminant analysis, the inland ecotypes were essentially distinguished from the coastal ecotypes by the following physiological and biochemical traits: Ψ pd , g s , polyphenol oxidase, superoxide dismutase and malonyldialdehyde. Inland ecotypes seem to be more tolerant to drought stress than coastal ecotypes.

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Section: Discussionsupporting

confidence: 85%

Section: Discussionsupporting

confidence: 85%

Physiological and biochemical traits of drought tolerance inArgania spinosa

Chakhchar

Wahbi

Lamaoui

et al. 2015

Journal of Plant Interactions

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“…Similar results were found in Bituminaria bituminosa and Fraxinus ornus [24][25]. Indeed, the decrease in water potential in the cytoplasm help to maintaining cellular water homeostasis [26], improving the ability of cells to maintain turgor pressure at low water potentials.…”

Section: Discussionsupporting

confidence: 75%

Anatomical adaptations of Astragalus gombiformis Pomel. under drought stress

et al. 2014

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The present study was designed to study the effect of drought on root, stem and leaf anatomy of Astragalus gombiformis Pomel. Several root, stem and leaf anatomical parameters (cross section diameter, cortex, root cortical cells, pith, leaf lamina and mesophyll thickness) were reduced under moderate to severe water deficit (20–30 days of withheld irrigation). The stele/cross section root ratio increased under moderate water deficit. The root’s and stems vascular systems showed reduced xylem vessel diameter and increased wall thickness under water deficit. In addition, the root xylem vessel density was increased in these drought conditions while it was unchanged in the stems. The stomata density was increased under prolonged drought conditions whereas the stomata size was untouched. The leaf vascular system showed reduced xylem and phloem tissue thickness in the main vein under moderate to severe water deficit. However, in the lamina the vascular tissue and the distance between vascular bundle were unaffected. Our findings suggest a complex network of anatomical adaptations such as a reduced vessel size with increased wall thickness, lesser cortical and mesophyll parenchyma formation and increased stomata density. These proprieties are required for the maintenance of water potential and energy storage under water stress which can improve the resistance of A. gombiformis to survive in arid areas.

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“…It is assumed that the chemical structure of Q plays an important role in free radical scavenging. The B ring hydroxyl structure is known to be the most significant factor of scavenging ROS and RNS because it donates hydrogen and an electron to hydroxyl, peroxyl, and peroxynitrite radicals, thus establishing a relatively stable flavonoids radical [Hernández et al 2009;Wolf et al 2010;Fini et al 2012]. The arrangement of functional groups around the nuclear structure is responsible for antioxidant activity of flavonoids.…”

Section: Discussionmentioning

confidence: 99%

Therapeutic effects of quercetin against bisphenol A induced testicular damage in male Sprague Dawley rats

Jahan

Ain

Ullah

2016

Systems Biology in Reproductive Medicine

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The present study was designed to investigate protective effects of quercetin against bisphenol A (BPA) induced testicular toxicity in male Sprague Dawley rats. Twenty adult male rats were divided into four groups. The first group served as the control and was provided with normal saline. The second group of rats was treated with 50 mg/kg of BPA dissolved in alcoholic saline. The third group received oral gavage of 50 mg/kg quercetin while the fourth group was treated with quercetin (50 mg/kg) along with BPA (50 mg/kg). All of the treatments were carried out for 52 days. Testicular tissues and epididymis were used for histology while blood plasma was used for hormonal and biochemical analysis. BPA administration resulted in a significant reduction in seminiferous tubule diameter and epithelial height with impaired spermatogenesis. Quercetin treatment resulted in restoration of spermatogenesis and reversal of histological damage. In addition, BPA treatment significantly reduced (p < 0.05) plasma testosterone level (ng/ml) while estrogen was not affected. Similarly, BPA caused a significant alteration in the lipid profile. Interestingly, quercetin treatment led to a marked increase in plasma testosterone, decrease in estrogen concentration, as well as a normalized lipid profile. In conclusion, results indicated that BPA administration induces toxic effects on testis and epididymis, impairs spermatogenesis, with an imbalance in hormonal levels and lipid profile while quercetin amended these toxic effects by restoring normal spermatogenesis, testicular tissue damage, and hormonal levels. This suggests that quercetin may be a potential therapeutic against BPA induced testicular toxicity. ARTICLE HISTORY

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Drought stress has contrasting effects on antioxidant enzymes activity and phenylpropanoid biosynthesis in Fraxinus ornus leaves: An excess light stress affair?

Cited by 143 publications

References 92 publications

Physiological and biochemical traits of drought tolerance inArgania spinosa

Physiological and biochemical traits of drought tolerance inArgania spinosa

Anatomical adaptations of Astragalus gombiformis Pomel. under drought stress

Therapeutic effects of quercetin against bisphenol A induced testicular damage in male Sprague Dawley rats

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